package com.mmall.util;

import java.util.Date;
import java.util.Random;

public class PasswordUtil {

    public final static String[] word = {"a", "b", "c", "d", "e", "f", "g", "h", "j", "k", "m",
                                         "n", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y",
                                         "z", "A", "B", "C", "D", "E", "F", "G", "H", "J", "K",
                                         "M", "N", "P", "Q", "R", "S", "T", "U", "V", "W", "X",
                                         "Y", "Z"
                                             };

    public final static String[] num = {
            "2", "3", "4", "5", "6", "7", "8", "9"
    };

    public static String randomPassword(){
        StringBuffer stringBuffer = new StringBuffer();
        Random random = new Random(new Date().getTime());
        boolean flag = false;
        int length = random.nextInt(3) + 8;
        for (int i = 0 ; i < length ; i ++){
            if (flag){
                stringBuffer.append(num[random.nextInt(num.length)]);
            }else {
                stringBuffer.append(word[random.nextInt(word.length)]);
            }
            flag = !flag;
        }
        return stringBuffer.toString();


    }

    public static void main(String[] args) {
        System.out.println(randomPassword());
    }
}
